竖式计算
26.4-12.8
23.5-13.7
360×45
612÷3.
26.4-12.8=13.6;
23.5-13.7=9.8;
360×45=16200;
612÷3=204;
When someone helps you, you should say______.[ ]
A. can I help you
B. that's OK
C. thank you
D. of course
感冒病证多发季节是()
A.春夏
B.夏秋
C.秋冬
D.冬春
E.四季